Lifting-jack.



No. 818,436. I PATENTED APR. 24, 1906. W. J. GRAY.

LIPTING JACK.

APPLICATION FILED NOV.10,1904. RENEWED MAR. 24, 1906.

alvanic-c Witness WILLIAM J. GRAY, OF SAUK CENTER, MINNESOTA.

LlFTING-JACK.

Specification of Letters Patent.

ratented April 24, 190

Application filed November 10,1904. Renewed March 24,1906. Serial No. 307.924-

To (ti/Z 'LUhU'l'fl/ it ntcty concern.-

Be it known that 1, WILLIAM J. GRAY, a citizen of the United States, residing at Sauk Center, in the county of Stearns and State of Minnesota, have invented certain new and useful Improvements in Lifting-Jacks, of which the following is a specification.

This invention embodies, primarily, a lifting device adapted for use upon vehicles, such as carriages and wagons, for elevating the body of the vehicle preparatory to the removal of a wheel for lubricating or other purposes.

The invention is not only designed as a lifting means, but is constructed with a view to utilizing the same in adjusting the wheel, so that the axle-arm may be readily greased or oiled, and, further, especial means are provided in connection with the lifting device by which the axle-nut may be readily removed and replaced without necessitating handling thereof by the operator.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following description and accompanying drawings.

While the invention may be adapted to different forms and conditions by changes in the structure and minor details without departing from the spirit or essential features thereof, still the preferred embodiment thereof is shown in the accompanying drawings, in which Figure 1 is a perspective view showing the embodiment of the invention in practical use. Fi 2 is a view in elevation showing the positlons of the parts of the device preparatory to operation of the main lever to effect elevation of the part operated upon. Fig. 3 is a partial vertical sectional view. Fig. 4 is a horizontal sectional view taken about on the line X X of Fig. 2.

Corresponding and like parts are referred to in the followin description and indicated in all the views 0 the drawings by the same reference characters.

The invention comprises, mainly, a base 1, a lever 2, mounted upon said base, and a lifting-bar 3, carried by the lever. The lever 2 is provided at one end with a suitable handle, and said lever is deflected at a point between its ends, being bent laterally, as shown at 4, and thence downwardly. The lifting-bar 3 is pivoted at its lower end to the lever 2, the

point of pivotal support of said lever being between the ends of said lever, as shown at 3*. The lifting-bar 3 is preferably of tubular form and is provided with a head 5 of semicircular form, which head is adapted to engage beneath the hub of the wheel in the actual use of the invention. The head 5 is formed with a bar 6, which is mounted in the tubular portion of the lifting-bar 3, so as to be adjustable therein. The adjustment of the head 5 is necessary in order to adapt the invention for use upon different-sized vehicles, and in order to fix the head at an ascertained adjustment a suitable adjusting device in the form of a screw 7 is used, said screw passing through the upper extremity of the lifting-bar 3. A reinforcing-collar 8 is provided at the upper end of the lifting-bar, and the screw 7 passes through said collar and engages the member 6 in positioning the head 5.

The lever 2 is mounted upon the base by any substantial pivotal means, as shown at 9, and this lever carries adjacent the handle por tion thereof a sleeve 10 adjustable longitudinally of the lever by means of a suitable setscrew 11. The sleeve 10 is provided with an extension 12, and this extension is provided with a transverse bearing in which is mounted a short shaft 13, having a certain amount of slidable movement upon the sleeve 10 in the aforesaid bearing. A crank-handle 14 is carried by one end of the shaft 13, the opposite end being provided with a nut-engaging socket 15. The socket 15 may be of any suitable form adapted to receive a nut, and a rotating movement of the shaft 13 will impart similar movement to the said socket. Interposed between the extension 12 of the sleeve 10 and the above-mentioned socket 15 is a coil-spring 16, which normally holds the socket in engagement with the nut when the wheel is being operated upon.

In operating the lnvention the lever 2 is disposed in an inclined or approximately horizontal position, the base 1 being located adj acent the wheel which is to be operated upon. By pivotal movement of the liftingbar 3 the same is thrown in a position at an angle to the lever 2, and the head 5 of the lifting-bar is adjusted so as to engage beneath the hub portion of the wheel. By an upward movement of the lever 2 it will be readily seen that the wheel will be elevated a distance regulated by the position of the head 5,

and to hold the lever 2 in an upward position adjacent the lifting-bar 3 a spring 17 is used, said spring being secured at one end to the collar 8, the opposite end of the spring being adapted to automatically engage a lug 18, extending upwardly from the laterally-projected portion 4 of the lever. The spring 17 is provided with an opening which receives the lug 18 and establishes an interlocking connection between the upper end of the lift ing-bar 3 and said lever which positively holds the lever in an upright position, fixing the wheel also elevated from the ground. As the lever 2 is moved upwardly in the above operation the sleeve is suitably adjusted, so that the socket will receive the axle-nut, being held in engagement with this part by the spring 13. By actuating the crank 14 the nut of the wheel may be quickly unscrewed though not displaced from a posltion in which it is readily adapted to be replaced. The wheel may now be moved upon the axle-arm on which it is mounted, so that the spindle may be readily lubricated, and to accomplish the above it is only necessary to pull outwardly upon the lever 2, this throwing the lifting-bar outwardly and carrying the wheel bodily toward the extremity of the axle-arm. The axle-arm having been greased, the lever 2 is then forced toward the wagonbody, throwing the wheel into its proper posi tion, after which the crank 14 is operated to screw the nut carried by the socket 15 upon the spindle.

Having thus described the invention, what is claimed as new is 1. In a device of the class described, the

combination of a lever, a lifting-bar pivoted to the lever at a point between the ends of the latter, and a nut-operating means carried b the lever above the lifting-bar.

2. In a device of the class described, the combination of a base, a lever pivoted to said base, a lifting-bar pivoted at one end to the lever, and automatically operating means for connecting the opposite end portion of the lifting-bar with the lever.

3. In a device of the class described, the combination of a base, a lever pivoted at one end to the base, a lifting-bar pivoted at one end to the lever at a point between the ends of the latter, and spring interlocking means between the opposite end portion of the lifting-bar and the lever.

4. In a device of the class described, the combination of a lever, a lifting-bar pivoted at one end to the lever at a point between the ends of the latter, a lock device carried by the opposite end of the lifting bar, engaging means carried by the lever for cooperation with the said lock device, a lifting-head upon the lifting-bar, and adjustable nut-operating means movable longitudinally of the lever.

5. In a device of theclass described, the combination of a base, a lever pivoted to said base, a lifting-bar pivoted at one end to the lever, interlocking means between the opposite end of the lifting-bar and the lever, and a nut operating device adjustable longitudinally of the lever above said lifting-bar.

In testimony whereof I affix my signature in presence oftwo witnesses.

WILLIAM J. GRAY.

Witnesses I J. F. COOPER, G. L. COOPER. 

